what if they embrace new technology instead? ♪ imagine a company's future with the future of trading. company profile. a research tool on thinkorswim. from td ameritrade. a restdd# 1-800-345-2550orswim. searching for so you can take charge of your trading. >>> historic agreement aimed at preventing iran from building a nuclear weapon now under threat potentially, at least, from the u.s. senate. lawmakers including some democrats are taking diplomacy into their own hands in a move that could result in the collapse of that hard-won deal, at least potentially. jim sciutto is watching what's going on. i know the obama administration is very concerned what these members of the senate are planning on doing. >> no question. this puts congress on a direct collision course with the white house. as you know, they have been lobbying hard, the administration has been lobbying hard against it, secretary kerry, including sending a video message over the holidays arguing against sanctions, saying that will in effect scuttle this deal. what w